Derivative Financial Instruments (Amounts Recognized in AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized derivative gain (loss) on cash flow hedges, net of tax	$ 5,435	$ (3,524)	$ 33,746	$ 6,569
Other Comprehensive Income (Loss) | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized derivative gain (loss) on cash flow hedges, net of tax	5,647	(4,106)	32,705	4,830
Interest rate swaps | Other Comprehensive Income (Loss) | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized derivative gain (loss) on cash flow hedges, net of tax	5,798	(4,157)	32,746	5,111
Foreign currency forward contracts | Other Comprehensive Income (Loss) | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized derivative gain (loss) on cash flow hedges, net of tax	(135)	67	(53)	(265)
Commodity swaps | Other Comprehensive Income (Loss) | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized derivative gain (loss) on cash flow hedges, net of tax	$ (16)	$ (16)	$ 12	$ (16)